Gyrating-machine



J. H. EMERY.

GYRATING MACHINE.

APPucATlo'N man FEB. 17. 192|.

m6111611 June 21, 1921.

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INVENTOR ATTORNEYS JamesffEme/'g Bv @www mmmw J. H. EMEHY.

GYHATING MACHINE.

APPLICATloN FILED FEB.17.1921.

Patented June 21, 1921.

2 SHEETS-SHEET 2.

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illlll ummllnllulllllnnn INVENTOR ATTORNEYS STATES JAMES H. EMERY, 0FNEW YORK, N. Y.

@Amarins-MACHINE.

Specification of Letters Patent.

Patented June 21, 1921i.

Application filed February 17, 1921. Serial No. 445,868.

To aZZ whom t 'may concern Be it known that l, JAMES H. EMERY, a citizenof the United States, residing at lnwood Park, county of Queens, cityand State of New -York, have invented a new and useful improvement inGyrating-Machines, of which the following is a specification.

This invention relates to gyrating machines, that is to machines forimparting a spherically centrifugal or gyratory motion to a carrier, andmore particularly to such machines which are suitable for use in theproduction of hollow castings.

ln the' production of certain types of hollow castings a hollow mold ispartially lled with thermoplastic material and the mold is then givensuch motion as to cause the contained fluid to spread over the surfaceof the mold. 1t vthe mold were merely spinned about a single axis thematerial would accumulate in an equatorial belt, none being present atthe poles. It is therefore necessary, in order to produce an. evendistribution of the thermoplastic material within the mold, to impartthereto a movement of rotation about a plurality of non-parallel axes,that is a gyratory movement.

The principal object of the invention is therefore to` provide means forimparting to a carrier a movement of rotation about more than a singleaxis. In accomplishing this object there are provided means forrevolving a carrier in an orbit and for rotating the carrier about anaxis not perpendicular to the orbit.

More specifically the present invention contemplates the provision of arotatable shaft having a cranlror eccentric portion, a rod supported bysuch crank or eccentric portion, a carrier rotatably mounted on the rodand means responsive to the rotation of the crank shaft for rotating thecarrier about the rod as an axis while the resulting movement impartedto the rod revolves the carrierv through an orbit.

In the drawings illustrating one preferred embodiment of the invention,Figure 1 is a vertical .section taken on the line 1-1 of Fig. 2, showinga machine made in accordance with this invention; Fig. 2 is a verticalsection taken on the line 2--2 of Fig. .1; and Fig. 3 is a sectionalview similar to Fig. 2, showing a modification.

In these drawings there is shown .a frame comprising base members 4arranged to form a rectangle having uprights 5 located at* the cornersthereof, the uprights `being Joined at their upper ends by horizontalframe members 6 and 7. Conveniently located on the members 6 are twobearings 8 within which is journaled a shaft having aA crank oreccentric portion previously referred to, and here shown as a crankshaft 9 having an'offset or crank portion 10. For convenience inassembling the machine the shaft 9 is most desirably made in two partsunited by a suitable coupling 11. A rod 12 is rigidly secured in anydesired manner, as by the T-joint 13 to a sleeve 14, which is rotatablymounted upon the crank 10. A carrier 15, here shown as a disk, isrotatably secured in any desired manner as by a pin 16 to the upper endof the rod 12. Any suitable means may be provided to secure the objectto be gyrated to the carrier, there being provided in the presentembodiment a yoke 17 rigidly secured as by the T-joint 18 to the rod 12,having secured to its upper end the downwardly depending tube 19. Asclearly shown in Fig. 3, the tube 19 is threaded to receive the hub 24of a wheel 20. A rod 21 fits snugly within the tube 19 and carries atits lower end a circular plate 22 to which is secured a sheet 23 of woodor other suitable material. Coiled about the rod 21 and coniined betweenthe plate 22 and the hub 24 of the wheel 2O is avspiral compressionspring 25. rllhus when an object to be gyrated, such for example as amold 27, is set on the carrier 15 the wheel 2() may be turned down tocompress the spring 25 which in turn forces the plate 22 and the sheet23 into engagement with the upper surface of the mold 27 so that' themold is securely held in place on the carrier while there is no dangerof crushing the mold as might happen if non-yieldable means wereemployed to secure the mold to the carrier. l/Vhen it is desired toremove the mold from the carrier the wheel 20 is unscrewed, the sheet 23is lifted-and the mold is then easily removable.

1n order to prevent the greater weight carried by the rod 12 above thecrank 1`O from overbalancing the relatively light rod 12,` the lower endof this rod is confined as by being pivotally connected to one end of alink 28, the other end of which is pivoted to a fixed support 29, whichmay be rigidly secured to a cross-arm 30 carried by adjacentA uprights5, or which might besecured to one of the bottom frame members 4.

rlFhe machinemay be operated by the rotation of the shaft 9 by hand, ormechanical means may be provided for supplying the necessary power.There is here shown a pulley 31 rigidly secured to one end of the shaft9 which may be driven by a belt 32 passing over a pulley 33, which isrotated by the operation of a motor 34. The motor is most convenientlylocated upon a shelf 35 suitably supported upon adjacent uprights 5. j

From a consideration of Fig. 1, which shows in solid lines the positionof the mechanism when the crank 10 is in its lowermost position andwhich shows in dotted lines the position of the mechanism when the crankis in vits extreme right and left hand positions, it will be obviousthat rotation of the shaft 9 will revolve the carrier 15 through arelatively elliptical orbit, as indicated by the broken line 36.

The revolution of the carrier 15 in the orbit just described causescentrifugal forces tending to Vconcentrate -the Huid contained withinthe mold 27 in an equatorial belt which'lies at right angles to theplane of the drawing in Figs. 2 and 3. In order to produce centrifugalforces in a different plane so that the result of the combined forceswill spread the material evenly over the surface of the mold, it isnecessary to rotate the carrier about some axis which forms an angleother than a right angle with the plane of the orbit. The most eiicientresults will be produced when the second axis of rotation lies in theplane of the orbit and in the present embodiment this axis coincideswith the center of the pin 16 and the rod 12. In order to cause thecarrier to rotate about its pin 16 there may be provided, as shown inFig. 2, a pinion 37 rigidly secured to the crank 10 and constantly inmesh with a spur gear 38. The gear 38 is journaled on an axle 39, whichis rigidly secured to the rod 12 in any desired manner, as by anextension of the T-joint 18. On the underside of the carrier 15 there isprovided a circular rack 40 which is const-antly in mesh with the gear38. Thus when the shaft 9 is rotatedin a counter-clockwise dil rection,as indicated by the arrow in Fig. 1, the pinion 37, being rigidlysecured to the crank 10, will itself make one revolution in acounter-clockwise direction for each revolution o f the crank, thuscausing the spur gear 38 to rotatein a clockwise direction a fraction ofa turn, depending upon the ratio between the two gears. The gear 38transmits this motion to the rack 40, thereby causing the carrier 15 torotate aboutits pin 16,v in a clockwise direction as viewed fromV above.The arrangement shown in Figs. 1

and 2, while satisfactory under certain conditions, and simple inconstruction, is not the most economical in operation since the teeth ofthe gear 38, due to engaging `a circular rack, will wear away rapidly.Moreover, this arrangement does not provide for easy variation in therelative speeds of rotation of the Shaft 9 and carrier 15.

A better arrangement is that shown in Fig. 3, in which a spur gear 41and a bevel gear 42 detachably mounted on the same hub 43 aresubstituted for the gear 38 and a circular bevel rack 44 is substitutedfor the spur rack 40, thereby avoiding excessive wear on the gear teeth.y Moreover, this arrangement permits variation in the relative speeds ofrotation of the carrier 15 and the shaft 9 by the simple method ofreplacing the spur gears 37 and 41 with other gears having a diiferentreduction ratio.

Obviously friction rolls may be substituted for the gears 37 and 38,shown in Fig. 2, and a frictional surface for the rack 40 if desired.Moreover, the lower end of the rod 12 may be mounted on a cross-headwhich rides between vertical guide bars instead of being pivoted to thelink 28. The eccentricity of the orbit 36 may also be decreased byincreasing the length of the link 28, or this orbit may be made circularby providing diametrically opposed rollers on the periphery of thecarrier 15 together with a circular track of proper dimensions to guidetheir movement. In this case, the portion of the rod 12 below the joint13 would be left free or might be dispensed with entirely. Many otherchanges of details and dimensions might be readily suggested withoutnecessitating a departure from the spirit of this invention.

Having thus fully described the invention, what is claimed is:

1. A gyrating machine comprising a carrier, means for revolving saidcarrier in an orbit and means for rotating said carrier on an axismaking an angle other than a rightanglewith said orbit.

2. A'gyrating machine comprising a car rier, means for revolving saidcarrier in an orbit and means responsive to the operation of saidrevolving means for rotating said carier on an axis lying in the planeof said or it.A

3. A gyrating machine comprising a rod,

end of said rod, means for revolving an intermedi-ate portion of saidrod in an orbit and means responsive to such revolution for rotatingsaid carrier on saidrod.

5. In a gyrating machine the combination with a frame, a crank shaftrotatably mounted on said frame, a rod, means journaled on the crankortion of said shaft for supporting said rodi a link pivoted to saidframe and to an end of said rod to restrict the movement thereof, acarrier rotatably mounted on the other end of said rod, a source ofower, means for operatively connecting said source of power to saidcrank shaft to rotate the same, and whereby said carrier is revolved inan orbit and means responsive to such rotation for rotating saidcarrier.

6. A gyrating machine comprising a crank shaft, means for supporting thecrank shaft for rotation about one aXis, a carrier, and means journaledupon the offset portion of the crank shaft for supporting the carrier,said carrier being journaled for rotation about its supporting means.

7. A gyrating machine `comprising a crank shaft, means for supportingthe crank shaft for rotation about one axis, a carrier, and meansjournaled upon the offset portion of the crank shaft for supporting thecarrier, said carrier being journaled for rotation about its supportingmeans, and means responsive to the rotation of the crank shaft forrotating the carrier on its axis. f

8. In a gyrating machine the combination with a frame, a crank shaftrotatably mounted thereon, a rod supported by the crank portion of saidshaft, a carrier rotatably mounted on one end of said rod, means forretaining the other end of said rod below said crank shaft, a pinionfixed tc said crank portion,'a circular rack mounted on said carrier anda gear mechanism coperating with said pinion and said rack to rotatesaid carrier in response torotation of said crank shaft.

9. In a gyrating machine the combination with a frame, a crank shaftrotatably mounted thereon, a rod supported by the crank portion of saidshaft, a carrier rotatably mounted on one end of said rod, meanslforrestricting the movement of the other end of said rod, a pinion fixed tosaid crank portion, a circular beveled rackmounted on said carrier, abevel-gear rotatably supported by said rod and in mesh with said rackand a spur gear mounted for rotation with said,bevelgear and constantlyin mesh with ysaid pinion whereby said carrier is rotated in response torotation of said crank shaft.

10,. In a gyrating machine the combination with means for maintainingorbital motion in a plane, of means responsive to the aforesaid meansfor maintaininga rotary motion about an axis other than a normal to saidplane.

l1. In a gyrating machine the combination with means for maintainingorbital motion in a. plane, .of means responsive to the aforesaid meansfor maintaining a rotary motion about an axis other than a normal tosaid plane, and means for oscillating the axis.

l2. In a gyrating machine the combination with a'carrier, means forrevolving said carrier in an orbit, means for rotating said carrier onan aXis other than a normal to `the plane of said orbit, and means forsecuring to said carrier an object to be gyrated.

13. In a gyrating machine the combination with a carrier, means forrevolving said carrier in an orbit, means for rotating said carrier onan axis other than a normal to the plane of said orbit, and yieldablemeans for securing to said carrier an object to be gyra-ted.

14. In a gyrating machine the combination with a carrier, means forrevolving said carrier in an orbit, means for rotating said carrier onan aXis other than a normal to the plane of said orbit, means for secu1'ing to said carrier an object to be gyrated, and means for maintainingsaid object above said carrier at all times during the operation of themachine.

15. In a gyrating machine the combination with a carrier, means forrevolving said carrier in an orbit, -means for rotating said `carrier onan aXis other than a normal to the plane of said orbit and an ad]ustable

